Devstral Small 2 (24B) vs GPT-5
Mistral Devstral Small 2 (24B) | OpenAI GPT-5 | |
|---|---|---|
| Overview | ||
| Company | Mistral | OpenAI |
| Release date | Dec 9 2025 | Aug 7 2025 |
| Access | Open Weight | Proprietary |
| Benchmarks | ||
Nonsense detection BullshitBench v2Given a confidently-worded but nonsensical prompt, does the AI spot that it makes no sense and push back — instead of playing along and inventing an answer? The score is how often it clearly called out the nonsense. Higher is better. | — | 21% |
Community preference (code) Arena Elo (Code)Like the text arena, but people vote on which AI writes better code. The votes become a chess-style Elo rating on arena.ai. Higher is better. | — | 1394 |
| Timeline | ||
| Release gap | GPT-5 shipped 124 days before Devstral Small 2 (24B) | |
Which is better: Devstral Small 2 (24B) or GPT-5?
Devstral Small 2 (24B) and GPT-5 don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. GPT-5 shipped 124 days before Devstral Small 2 (24B), so benchmark comparisons should account for the intervening progress.
Devstral Small 2 (24B) is open weight, while GPT-5 is proprietary.
Direct benchmark comparisons are unavailable — Devstral Small 2 (24B) and GPT-5 don't publish scores on any of the same benchmarks.
Frequently asked questions
Devstral Small 2 (24B) was released by Mistral on Dec 9 2025.
GPT-5 was released by OpenAI on Aug 7 2025.
Devstral Small 2 (24B) is an open weight model released by Mistral. GPT-5 is a proprietary model released by OpenAI.
Other comparisons
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